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The Journal of Cell Biology, Vol 27, 621-638, Copyright © 1965 by Rockefeller University Press

ARTICLE

ELECTRON MICROSCOPE OBSERVATIONS ON THE STRUCTURE AND DISCHARGE OF THE STENOTELE OF HYDRA

Carl F. T. Mattern 1, Helen D. Park 1, and Wendell A. Daniel 1

1 From the National Institute of Allergy and Infectious Diseases, Laboratory of Biology of Viruses, and the National Institute of Arthritis and Metabolic Diseases, Laboratory of Physical Biology, Bethesda, Maryland

Sections of the stenotele type of nematocyst of Chlorohydra hadleyi have revealed that the stenotele, upon firing, completely everts its stylets and spines and the long, thin tubule, much as the eversion of the tubule of the nematocyst of the jewel anemone (Picken, 1953; Robson, 1953). Alternative mechanisms for supplying the energy necessary to forcefully discharge the stenotele contents are discussed as well as the possible significance of several regions containing highly ordered periodic structure. The origin of nematocysts as kinetosomal derivatives is discussed as a possibility suggested by the symmetry of the stenotele contents and the structure, location, and function of the cnidocil.

Submitted on June 25, 1965


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